***NEW*** 350x Performance mod!!!!! (your input mratc or other 350x guys)

[NOS_350X]

Ok, well the other day Badchevelleman and i where out here at my place riding. We got bored and decided to take a rev box (cdi) from a 400ex that i had lieing around and pulg it into erics 350x. My first worries, Dynatek told me that the pickup for the timing was something like 140degrees off. I was worried that the revbox might fry but figuring i dont have an EX anymore who cares, the cr500 is in the frame of the ex and the engine is long gone. WELL, it pulged right into the wiering harness of the 350x. Then it was to the moment of truth, The bike started first kick :iluvu: It idled higher, and throttle was much more responsive. After running his stock 350x (with revbox) agenst my stock 350x for a bit we decided to see what the box would change. So we removed it to put it onto my stock X. We get it on and it wont start. It fianly does, wont rev up at all. lean poping BAD. So i dumped that idea put the stock one back on. I figured ill play with it on another day. We also tryed it on my built X and it did the same thing lean poping like crazy. I cant jet that one up seeing i already have jets bigger than what are made for it in there BEFORE the rev box.

Im going to play with it on the stock one and the mild built one. But just to infor all you, Dynatek makes some of the most awesome ignitions You have 4 programeable settings basicaly letting you put your power exactly where you want it. Giving me the option of doing it on my X has me :headbang:. If anyone has any experience with a hotter ignition for the X please inform me.

[badchevelleman66]

DICK HEAD!!!:doh: our little secret it out :thmbsdwn:
lol my stocker hauls ass:booty:

[Gdkarma]

Did it work on one machine, but not the other two? Is there a reason why, or a guess why?

[mymint87]

DICK HEAD!!!:doh: our little secret it out :thmbsdwn:
:

LMAO...thats what friends are for!!!

[NOS_350X]

Did it work on one machine, but not the other two? Is there a reason why, or a guess why?
Exactly, worked on one, but not 2 others.

One idea is just the jetting, Since i jetted in my 350x's its droped 40 degrees causing them to run lean and witht he better ignition its causing it to run so lean it wont rev up.
Another is my engines are 85's and his in a 86 crate engine. But i didnt think there was anything diffrent in the cdi's between the 2, I knew the stators & flywheel but i didn think the whole electrical system was diffrent.

[wild200x]

so you think we need bigger jets in the stock 85 to do this mod? cant wait to hear more on your testing! i may do it to the beeter X.

[dads]

the stock 85 runs a smaller secondeary jet than the 86
I think it's a 42 and the 86 runnes 45
the only diff.

[NOS_350X]

Ted i would say yes. Dont know for shure exactly but i would say yes.


Dads, There are many diffrences between the 85 and 86 bikes, I for one think it was the jetting that stopped it from working on my 2 350x's i tryed it on.

[dads]

I have the 85 carb kit in my 86. the only thing that I did not use was the secondary jet to small. and on the needle used the sec. grove from top.

[250sx]

I have an '86. Send it to me and I'll test it for ya. :D

[Black Sheep]

Exactly, worked on one, but not 2 others.
Another is my engines are 85's and his in a 86 crate engine. But i didnt think there was anything diffrent in the cdi's between the 2, I knew the stators & flywheel but i didn think the whole electrical system was diffrent.

The 85 came with a differant regulator then the 86. Both parts were later superseeded and replaced with one that worked on both. Although not an offical recall Honda dealers sometimes would replace them. However if the 85 has the original regulator that may be why your having different results. the original 85 regulator would allow more voltage through the system. I remember when i once put an 86 stator in my 85 i had to use a 86 regulator. i fried two stators before i learned that one! (original 85's were also prone to blowing headlights)

after that i can't tell you much. I never altered my 350X's ignitions. the machines i built were for long distance and reliability and nothing is as relable as the stock Honda ignition. Additionally back then we did not have the options out now. since i no longer deal with 350X's for over 6 years i have not tried anything new on them. I do remember once toying with the idea of a 400ex CDI box but scrapped it when i learned it had a rev limiter.

[Gdkarma]

This has turned into an interesting discussion. I have a stock 400EX box that I will try when things are up and running. I wonder if an aftermarket box would resolve the rev limit that BS talks about?

[NOS_350X]

This has turned into an interesting discussion. I have a stock 400EX box that I will try when things are up and running. I wonder if an aftermarket box would resolve the rev limit that BS talks about?

Yes it does. The box i have is an aftermarket one.

The thing im looking at it for is the Dyna Tek ignitions. They are programeable, with 4 settings. I want to be able to pick where i want my power at the flip of a switch.

[SYKOLINCOLN]

so....is this cdi working on a 86 or 85 model?? and are all years 400ex cdi's the same?

[NOS_350X]

So far it has only worked on the 86 model. Yes all years of the 400ex are the same. A stock 400ex cdi has a rev limiter so you wont get anything out of that but the advanced curve of the aftermarket one will give you some more performance. Found a Sparks rev box for a 400ex so ill try that on the 350x in the next few days.

[SYKOLINCOLN]

so the rev limiter really effects the rpms on the 350X that bad? I have an 86 and even though im still thinking about selling it, I might still try this.

[NOS_350X]

so the rev limiter really effects the rpms on the 350X that bad? I have an 86 and even though im still thinking about selling it, I might still try this.

Not shure. I would think it would be a nice inshurance If you where having newbies ride or chicks. On the ex yes you can feel the revlimiter.

[Gdkarma]

Hmmm, I wonder if the '86 regulator would resolve the issue with the '85 motors, and allow this simple mod to work:rolleyes:

We're all waiting for you to test and confirm NOS!!

[NOS_350X]

Hopefuly tomarow i will get out there and work with them some. Ive been riding e very day then tinkering with the bikes. I want to play with the jetting and see if its jetting or ignition that was letting them reving up on the 85's. Ill inform yall when i get it situated out completely.

[xcracer160]

hurry up man the suspence is killign me or ya can just do what i did flip the bend in the cradle and throw a 450r motor in the 350x lol

[NOS_350X]

Well, so far, its only worked on one 350x. Thats erics, and the only 86 all of mine are 85's and it hasnt worked on. One rev box (AMR stage 3) i have they will start but wont rev.

My gess is, the timing pick up is a few degreese off between the 85 and 86, So on the 85's when reving up the increased advance as the revs increase cause it to not run. Now like i said i dont know for shure thats just a gess. Im going to try diffrent boxes and bikes at the trike rally. Maby get soem more testing sooner if i can find a 86 here close.

[225]

Anybody try this on a 85 or 86 250R?

[NOS_350X]

I tryed a 250r cdi on the 350x but not much of a surprize no luck. On the 250r's go with a dyna tek ignition. They kick ass. 4 programable curves you can pick from. I have a few other cdi's here from diffrent dirbikes cr250's and 125's i want to see if they will give a 250r a little more performance over the stocker.

[225]

I tryed a 250r cdi on the 350x but not much of a surprize no luck. On the 250r's go with a dyna tek ignition. They kick ass. 4 programable curves you can pick from. I have a few other cdi's here from diffrent dirbikes cr250's and 125's i want to see if they will give a 250r a little more performance over the stocker.


Have you tried one for the 250R ATC?

[NOS_350X]

Ok heres a bit of an update. I had thoguht that it was defently a 86 only mod Today It started on this new 350x i got. Soo im baffled why its not working on my 3 previous 350x's. All 85's and the new one is an 85 also. So im baffled need to do some more experimenting.

[SWIGIN]

does the new 85 have a 86 flywheel and stator?

[NOS_350X]

Ok heres the deal, The 86 350x igntion system will accept a 400ex Cdi. A 85 will not. I fianly pulled the covers and looked.

[?stock?350x]

what tells me if i have an 85 or 86 cover on mine so many parts hard to tell what i put on the thing

[superchomper2003]

Realize this is old but im interested in it. Also wondering how to tell what is on mine 85 or 86. I started with a box of mix matched parts and built one so I dunno what is what, all I know is that my frame is an 85.

[ride_red]

I too tried this years ago with my buddies 400EX CDI, worked fine on my 86'...but a stock 400EX CDI has the 10.5K??? RPM revlimiter, so I would not see the benefits of using a STOCK one....but an aftermarket may have some possibilities. :D

[kazander]

dyna-tek shows a box for the trx250r but nothing on the 350x i would like to hear more on this subject as i own one of each. well sort of on the 250 but the 350 is an 86 and i am planning on working it over next year.

[NOS_350X]

If you have an 86 350x ignition you can use a 400ex ignition stystem. You CANNOT use a programable ignition on the 85 250r, The 86R harness will accept a Dyna, but unless your lucky enough to find one of the ones they made for it (they dont make them anymore)

[NOS_350X]

I too tried this years ago with my buddies 400EX CDI, worked fine on my 86'...but a stock 400EX CDI has the 10.5K??? RPM revlimiter, so I would not see the benefits of using a STOCK one....but an aftermarket may have some possibilities. :D


You are correct there. Dont use a stock one, The DYNA will give you the ability to program your ignition curve.

[kazander]

dyna shows the non programable module for the 86 thru 89 but if it wont work with the harness for the 85 i can understand. on the 400ex they show a programable one for 99 thru 03 and a non programable for the 99 thru 08 but there is $250.00 difference between the 2. so the best way to go is to spend the money and try out all four curves to find what works best or have you found one to try out yet?

[NOS_350X]

IMO the programable one is the only way to go.

You can get the curve you want to perfectly fit your motor and your riding style.

On the programable unit you buy the software to change it or go to a builder and have them do it. I really like them when i race because i can adjust them to the track. If i want less power i can put it to a stock setting, Big long tracks a topend setting or a tight track you get the torque. just at the flip of a switch.

[leevarnado]

anything like this for the 1st gen 200x

[Indy650]

the aftermarket 250x and 300ex cdis work on my 350x engine

[RUSTY]

I am running 400ex box on my 86 350x, It works good. I also have on my 400ex a xr250 box that gives you 800 more rpm and a faster Ing. curve. It made a big change in the bottom end toque. The xr250 part # is 30410-kle-671. (1992-2004)